Perfect Machine for blender
I would say there are two criteriae for the machine: speed of the UI and 3D-tools and speed of the renders. For the UI you are very well covered. (I have been desperately sculpting with dyntopo on a 15-year old two-core no physical (integrated or other) graphics card (I had to virtualize an old OpenGL-compatible card). It was awful, but OK for the very desperate cases)

So everything 3D or UI, you are good. Then there is rendering. If you want to render with Cycles, you want to use a CUDA enabled (ie. Nvidia-brand) graphics card. There should be changes to this on the way, but for now that's the deal. So while you would have a powerful graphics card, you couldn't practically use the card for rendering.